oj.uz

Submission #1036558

# Submission time Handle Problem Language Result Execution time Memory
1036558 2024-07-27T13:55:00 Z Abito Sky Walking (IOI19_walk) C++17
0 / 100
 4000 ms 575244 KB 
#include "walk.h"
#include <bits/stdc++.h>
#define pb push_back
#define F first
#define S second
#define ll long long
//#define int long long
#define ep insert
using namespace std;
const int N=1e5+5;
int n,m,a[N],b[N],L[N],R[N],c[N];
set<pair<int,int>> s[2][N];
map<pair<int,int>,ll> dis;
map<pair<int,int>,bool> vis;
vector<pair<int,int>> ad[N],er[N];
void dijkstra(int src){
    dis[{src,0}]=0;
    priority_queue<vector<ll>> pq;
    pq.push({0,src,0});
    while (!pq.empty()){
        int x=pq.top()[1],y=pq.top()[2];
        pq.pop();
        if (vis[{x,y}]) continue;
        //cout<<x<<' '<<y<<endl;
        int D=dis[{x,y}];
        vis[{x,y}]=1;
        if (y==0){
            if (!s[0][x].empty()){
                int to=(*s[0][x].begin()).S;
                if (dis.find({x,to})==dis.end() || dis[{x,to}]>D+c[to]){
                    dis[{x,to}]=D+c[to];
                    pq.push({-dis[{x,to}],x,to});
                }
            }
            if (dis.find({x,m+1})==dis.end() || dis[{x,m+1}]>D+b[x]){
                dis[{x,m+1}]=D+b[x];
                pq.push({-dis[{x,m+1}],x,m+1});
            }
            continue;
        }
        if (y==m+1){
            if (!s[0][x].empty()){
                int to=(*--s[0][x].end()).S;
                if (dis.find({x,to})==dis.end() || dis[{x,to}]>D+b[x]-c[to]){
                    dis[{x,to}]=D+b[x]-c[to];
                    pq.push({-dis[{x,to}],x,to});
                }
            }
            if (dis.find({x,0})==dis.end() || dis[{x,0}]>D+b[x]){
                dis[{x,0}]=D+b[x];

            }continue;
        }
        if (dis.find({x,0})==dis.end() || dis[{x,0}]>D+c[y]){
            dis[{x,0}]=D+c[y];
            pq.push({-dis[{x,0}],x,0});
        }
        if (dis.find({x,m+1})==dis.end() || dis[{x,m+1}]>D+b[x]-c[y]){
            dis[{x,m+1}]=D+b[x]-c[y];
            pq.push({-dis[{x,m+1}],x,m+1});
        }
        auto it=s[0][x].upper_bound({c[y],y});
        if (it!=s[0][x].end()){
            int to=(*it).S;
            if (dis.find({x,to})==dis.end() || dis[{x,to}]>D+abs(c[to]-c[y])){
                dis[{x,to}]=D+abs(c[to]-c[y]);
                pq.push({-dis[{x,to}],x,to});
            }
        }
        it=s[0][x].lower_bound({c[y],y});
        if (it!=s[0][x].begin()){
            int to=(*--it).S;
            if (dis.find({x,to})==dis.end() || dis[{x,to}]>D+abs(c[to]-c[y])){
                dis[{x,to}]=D+abs(c[to]-c[y]);
                pq.push({-dis[{x,to}],x,to});
            }
        }
        it=s[1][y].upper_bound({a[x],x});
        if (it!=s[1][y].end()){
            int to=(*it).S;
            if (dis.find({to,y})==dis.end() || dis[{to,y}]>D+abs(a[to]-a[x])){
                dis[{to,y}]=D+abs(a[to]-a[x]);
                pq.push({-dis[{to,y}],to,y});
            }
        }
        it=s[1][y].lower_bound({a[x],x});
        if (it!=s[1][y].begin()){
            int to=(*--it).S;
            if (dis.find({to,y})==dis.end() || dis[{to,y}]>D+abs(a[to]-a[x])){
                dis[{to,y}]=D+abs(a[to]-a[x]);
                pq.push({-dis[{to,y}],to,y});
            }
        }
    }return;
}
long long min_distance(vector<int32_t> x, vector<int32_t> h, vector<int32_t> l, vector<int32_t> r, vector<int32_t> y, int32_t S, int32_t g) {
    n=x.size(),m=l.size();
    for (int i=0;i<n;i++) a[i+1]=x[i],b[i+1]=h[i];
    for (int j=0;j<m;j++) L[j+1]=l[j]+1,R[j+1]=r[j]+1,c[j+1]=y[j];
    for (int j=1;j<=m;j++){
        ad[L[j]].pb({c[j],j});
        er[R[j]].pb({c[j],j});
    }
    set<pair<int,int>> ms;
    for (int i=1;i<=n;i++){
        for (auto u:ad[i]) ms.ep(u);
        for (auto u:ms){
            if (u.F<=b[i]) s[0][i].ep(u),s[1][u.S].ep({a[i],i});
            else break;
        }
        for (auto u:er[i]) ms.erase(u);
    }
    dijkstra(S+1);
    if (dis.find({g+1,0})==dis.end()) return -1;
    return dis[{g+1,0}];
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 14940 KB Output is correct
2 Correct 2 ms 14940 KB Output is correct
3 Correct 3 ms 14940 KB Output is correct
4 Correct 2 ms 14940 KB Output is correct
5 Correct 3 ms 14940 KB Output is correct
6 Incorrect 3 ms 14940 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 14940 KB Output is correct
2 Correct 2 ms 14940 KB Output is correct
3 Correct 2535 ms 178832 KB Output is correct
4 Incorrect 1803 ms 205368 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 182 ms 44352 KB Output is correct
2 Execution timed out 4091 ms 575244 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 182 ms 44352 KB Output is correct
2 Execution timed out 4091 ms 575244 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 14940 KB Output is correct
2 Correct 2 ms 14940 KB Output is correct
3 Correct 3 ms 14940 KB Output is correct
4 Correct 2 ms 14940 KB Output is correct
5 Correct 3 ms 14940 KB Output is correct
6 Incorrect 3 ms 14940 KB Output isn't correct
7 Halted 0 ms 0 KB -